Girls in men's changing room

I see no reason why it would be a problem for girls and men to share a changing room. My daughters are 10 and 15 and still come to the changing room with me, and I have seen other fathers and daughters do the same. They may get a look or two from others but they are comfortable and nobody has complained about it. I would rather all changing rooms become unisex for simplicity.

I completely agree. separating the sexes is wrong, and psychologically damaging. Everyone needs to see each other naked.